82 lines
1.6 KiB
Plaintext
82 lines
1.6 KiB
Plaintext
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/**
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* Radial Pocky
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* by Ben Fry.
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*
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* Unwrap each frame of live video into a single line of pixels along a circle
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*/
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import processing.video.*;
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Capture video;
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int videoCount;
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int currentAngle;
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int pixelCount;
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int angleCount = 200; // how many divisions
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int radii[];
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int angles[];
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void setup() {
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// size must be set to video.width*video.height*2 in both directions
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size(600, 600);
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// This the default video input, see the GettingStartedCapture
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// example if it creates an error
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video = new Capture(this, 160, 120);
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// Start capturing the images from the camera
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video.start();
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videoCount = video.width * video.height;
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pixelCount = width*height;
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int centerX = width / 2;
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int centerY = height / 2;
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radii = new int[pixelCount];
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angles = new int[pixelCount];
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int offset = 0;
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for (int y = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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int dx = centerX - x;
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int dy = centerY - y;
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float angle = atan2(dy, dx);
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if (angle < 0) angle += TWO_PI;
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angles[offset] = (int) (angleCount * (angle / TWO_PI));
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int radius = (int) mag(dx, dy);
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if (radius >= videoCount) {
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radius = -1;
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angles[offset] = -1;
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}
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radii[offset] = radius;
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offset++;
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}
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}
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background(0);
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}
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void draw() {
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if (video.available()) {
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video.read();
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video.loadPixels();
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loadPixels();
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for (int i = 0; i < pixelCount; i++) {
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if (angles[i] == currentAngle) {
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pixels[i] = video.pixels[radii[i]];
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}
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}
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updatePixels();
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currentAngle++;
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if (currentAngle == angleCount) {
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currentAngle = 0;
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}
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}
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}
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